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Thick film resistor fabricated with YBa2Cu3O 7-x superconducting powder

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2 Author(s)
Fu Shen-Li ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Yu-Hung Hsieh

Thick-film resistor paste was prepared utilizing the characteristics of low resistivity and small positive temperature coefficient of resistivity (TCR) around the room temperature of the YBa 2Cu3O7-x (YBCO) superconductor. PbO or PbO2, together with Ag2O, were added to densify the fired film and to achieve adequate resistivity values for practical applications. By adjusting the contents of Ag2 O and PbO or PbO2 in the YBCO, sheet resistivities ranging from a few ohms per square to several megaohms per square were obtained. Adding PbO2 is superior to PbO, because using PbO 2 makes material preparation easier, allowing for a smaller negative TCR (even though TCR values are still higher than expected). The relationships between the TCR of the fabricated resistors and individual TCRs of YBa2Cu3O7-x, Ag2O, and PbO were studied

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Components, Hybrids, and Manufacturing Technology, IEEE Transactions on  (Volume:14 ,  Issue: 3 )